Publication Date:
2016-11-16
Description:
Single crystals of dilithium-acetylenedicarboxylate-dihydrate, Li 2 ADC · 2H 2 O ( 1 ), were isolated from a solid product formed by isothermal evaporation of an aqueous solution of LiOH und acetylenedicarboxylic acid (H 2 ADC). 1 crystallizes in the triclinic space group P 1 with Z = 2. LiO 4 tetrahedra are interconnected by ADC 2– anions and water molecules to form a 3D polymeric structure. Coupled TGA and DTA measurements show that 1 loses its two water molecules above 100 °C. Heating a polycrystalline sample of 1 at 140 °C for 2 h in an argon atmosphere leads to a significant change of the powder diffraction pattern indicating the formation of the new anhydrous coordination polymer dilithium-acetylenedicarboxylate, Li 2 ADC ( 2 ). Its crystal structure was solved and refined from X-ray powder diffraction data. 2 crystallizes in the orthorhombic space group Fddd (Z = 8). LiO 4 tetrahedra are interconnected by ADC 2– anions to form a 3D polymeric structure.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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